Water-heating apparatus



oct. 29, 1929.

M. C. REcK WATER HEATING APPARATUS Filed M ay l, 1929 2 Sheets-Sheet loct. 29, 1929. M., c. RECK 1,733,628,

WATER HEATING. APPARATUS Filed May l, 1929 2 Sheets-Sheet 2 INVENTORPatented Oct. 29, 1929 Unirse STATES lfTAURUS C. RECH, OF ROCHESTER, NEWYORK7 ASSIGNOR TO- STERLXNG RANGE k.AND

PATENT OFFICE FURNACE CORPORATTON, vOF ROCHESTER, NEW YORK, ACORPORATION OF EW YORK Application filed May 1,

The present invention relates to water heating apparatus and moreparticularly to the type employed in connection with gas stoves orranges where different fuels are used, such for example, as coal andgas. One object of the invention is to provide improved apparatusof thisclass which is eflicient in service, comparatively simple inconstruction and convenient to operate.

A further object of the invention is to provide improved means by whichto effect a reduction in the temperature of the productsy of combustionafter leaving the combustion chamber and before reaching the dischargepipe leading from the stove whereby to avoid the danger of fire due toXcessive temperature in the pipes.

A further obj ect of the invention isto provide an improved heatingarrangement including means for controlling the products of combustiondesigned to insure economy in the use of the fuel with an increase inthe heating capacity. n

To these and other ends the invention resides in certain improvementsand combinations of parts, all as will be hereinafter more fullydescribed, the novel features being pointed out in the claims at the endof the specification.

ln the drawings: f

Fig. 1 is a side elevation of the upper portion of a stove embodyingtheinvention;

Fig. 2 is a fragmentary part sectional elevation illustrating" thearrangement ofthe heating coils and associated parts;

Figf is a transverse sectional elevation taken suhstantiallyon line3M-3a of Fig. 2;

Fig. 4; is a part sectional plan taken substantially on line t-4L ofFig. 3.

Fig, 5 is a fragmentary sectional plan taken on line 5"-5 of Fig. 2 andp Fig. 6 is a sectional plan taken on line (5L-6u on Fig. 2. i

Similar reference numerals throughout the several viewsindicate the sameparts.

The present construction comprises generally a stove or range embodyinga heating arrangement havingy separate combustion chambers. the heatfrom either one of Which may he utilized to heat the water in thecirculating WATER-HEATING APPARATUS 1929. serial No. 359,656.

system, or if preferred both may be used at the same time to afford amore rapid increase in the temperature of the water. One of theimportant features ofthe invention embodies the improved means forinsuring the passage y of the products 'of combustion into more directrelationship with the coilsin the gas heated chamber, along with meansfor retarding the passage of the gas fromthe chamber whereby toeconomize inthe use of fuel while maintaining the efliciency'of theapparatus and reducing thetime required to heat the water toagivendegree `of temperature.

The apparat-us further embodies the com- 'i bination of a cooling spacekor spaces in the' form of one or more chambers between the outlet ypipefor the gas and the combustion chamber along with an `improvedarrangement for delivering cold airto said chambers for reducing thetemperature of the products of combustion therein in order yto avoid eX-cessive temperatures within the outlet pipe from re likely to rear wallsand also with a vertical main side y wall comprising the upperand lowersectionsk 15 and 16 respectivelyv as best` shown in Fig. The ovencompartments "arennot shown, but one of the side walls therefor'isindicated at 17, and the smoke pipe for ycarrying olf the products'ofcombustion is shown at 18, Fig. 3.

The fire box for burning coal or the like is designated at 19 andisprovided withgrate sections`20 and fire brick walls 21 at the front,`back andalong one sidewhich are neferably carried by a frame`22supported by the walls 16 and 17 as shown in Fig.' 3.

The outerside of the fire box is closedbyfa hollow casting forming awater compart-` ment7 the inner wallof the castingbeing indicated at23an'd the outer wallat 24. A horizontal. partition 25 kseparates theycompartment into lower and upper chambers 26 and?? whicharelconnectedwth inlet and outlet pipes 2S and 29 respectively. Thesepipes are connected with the water supply or rboiler (not shown). Y Oneor more openings 30 are formed in the Wall of the partition Yto permitthe water to Vcirculate from the lower to the upper chamber. The castingis suitably supported by the upper and lower sections 15 and 1G or" theleft side wall of the stove as viewed in Fig. 3.

For the purpose of, heating the water when the tire box is not in use agas burning chamber 31 is employed adjacent the outer wall 24 or" thecasting. Arranged within this chamber are a plurality of waterconducting coils 32 each having an inlet portion 33 connected with thelower chamber 26 and an outlet portion 34 connected with the upperchamber 27, it being understood that the water circulates simultaneouslythrough the coils7 passing from the lower chamber to the coilsanddischarging therefrom into the upper chamber. A cone-shaped member 35 isplaceduithin each coil with vits smaller end at the bottom 01"' thecoil, the purpose of these members beingfto spread and retard theproducts of combustion when passing through the coils whereby toincrease the eiiiciency of the heater. The cone-shaped members beinglarger at their upper than at their lower ends tend to delay or chokethe passage of the burning gas within the coils and to direct it againstthe surfaces thereof whereby to more electively heat the same.

VBeneath the. heating chamber 31 is located a longitudinally extendinggas burner 36' which is supported at its rear end by a lug 37 extendingthrough an opening 38 in the rear wall 12 of the chamber which forms asupport for the lug. The burner is support.- ed adj acont its front endby lugs 39 on 'the wall sections 13 and 16 respectively as shown in llig. 3. Connected with the burner is a Vshort mixing pipe v40 or' theusual construction, into the lower end of which projects the .dischargenipple of a'valve 41 connected with a suitable manifold or supply pipe42, Fig. 2.

y Beneath the burner isv a bottom plate 43 the rear end of which isslotted at 44 to receive the mixing pine 40, said end being supportedbya' collar 45 on the mixing pipe.v

ihe front endor" the plate 43 rests on an inwardly projectingflange-like portion 46 of a door or closure 47 tor an opening in thefront wall 11 opposite the front end of the burner The plate 43 ispreferably secured to said flange-like portion by a bolt 48. rilheclosure 4T-is provided with two inwardly projecting'lugs 49, Figs'2 and5, which rest' upon lugs'or abutments 50 on the walls 13 and 16 betweenwhich the burner is disposed. An additional lug 51 projects inwardlyfrom the closure 47 and engages the inner face of the wall 13 to Steadyand prevent lateral shitting of the closure. A pivoted latch 52 isprovided for holding the closure in position as indicated in Fig. 2. Theclosure has a flange 53 at right angles to its face which abuts the endof the lower portion oi the side wall 13. kThe plate is provided with aplurality of openings 54 for the admission or Secondary air to theburner chamber. Furthermore, the sides of the plate are slightly spacedfrom the walls 13 andl, Fig. 3 to afford openings 55 and 56 foradmitting an additional supply of secondary air to the burner chamber.The Yplate 43 is in the form or a shallow pan, designed to catch thedrippings from the coils 327 due to condensation, which will be quicklyevaporated by the heat from the burner. .T he side walls of the pan areformed by turning up the peripheral edge portion oi' the plate, as at43a and providing opstanding portions 44fL surrounding the openings 54.

T he closure 47 and the pan attached there o cabe readily withdrawn as aunit so that lie burner and mixing pipe 40, constituting ..1..-otherunit, may be quickly detached by a .ongitudinal movement through theopening irotected bv the closure, after the rear end c he burner hasbeen lifted sufficiently to vr .iit the lower end oi the mixing pipe tol af the discharge nipple on the valve 41. By suspe ding the burner inthe manner described it will be seen that it can be detached and cleanedwhenever necessary and reinserted wi hout the use of tools fordisconnecting any parts of the burner or the supporting means therefor.

interposed between the rear coil 32 and the wall 12 is a channel-shapedmember 57 which is closed at its top and bottom, but which is preferablyopen at its ends, said ends being slightly spaced from the walls 13 and24, the latter being the outer wall of the casting through which thewater circulates. An insulating air space 58 is thus provided betweenthe rear coil 32 and the wall 12 'for conservingthe heat and also Jforprotecting the wall 12 from the high temperatures Yof the combustionchamber. A secondV channel-shaped member 59 is interposed between thefirst coil 32 and the wall 11 'for the same purpose with an insulatingair space 60 between saidparts. Said channel-shaped members alsoconstitute means 1for causing` the heated gas at the ends ofthechamber31 Vto be directed upwardly into contact with the end coils 32whereby to insure greater etiiciency inthe heating capacity of thechamber. The channelshaped members are held in position by one of morescrews 61 serving to clamp the members in the position shown. TheVchannels 57 and 59 can be readily removed-through the door opening andnew channels subs-ti.- tutcd when desired. The channel 57 has aninwardlyjprojecting shelf-like portion 62 with its inner edge shoulderedto receive one end of a cover plate V63 the opposite end of which isformed for support by the upper portion of the channel 59 as shown inFig. 2. A pivoted latch y64C is carried by said shelflike portion forholding the cover plate in position to close the chamber 31, said platebeing removable through the door openings when the latch is released.TheA cover is curved upwardly at its inner edge and is shouldered asindicated in Fig. 3 to engage the bottom edge of the wall and the outerface thereof as well. .The cover is disposed directly over the coils 32to check the iiow of gas from the heating chamber. The cover, at a pointoverthe left hand coil 32 Fig. 2, has an opening 63a for the escape ofthe products of combustion and is also cut away at 645L for the samepurpose. A more rapid escape of the gas at this point is desirable inFig. is provided with an inturned flange 78 which.

for the reason that it accumulates faster at the end of the chamber thanelsewhere due to the proximity of the inlet pipe 40 to the dischargeports at the left hand end of the burner.

The side wall 15 above the heating chamber 31 is provided with an outletpassage 65 leading to a cooling chamber or Hue 66 above the iire box 19which is in direct communication with the outlet pipel8. When relyingentirely on the burning of fuel in the .tirebox 19 to both heat thestove and the water passage may be closed by a damper 67 as shown by thedotted line positioned in Fig. 3. The damper is provided with trunnionlike portions 68 and 69, the latter of which is preferably madedetachable, said portions i being journalled in suitable bearings70projecting from the wall 15 as shown in Fig. 3. The trunnion 69 isextended through the wall 11 and carries a handle or operating portion71 for swinging the damper to and from closed position. The damper maybe locked in open position by a pivoted latch 7 2, which forms no partof the present invention. The t-runnion 68 is extended through the lefthand wail. 12 of the heating chamber 81 and is provided with a crankarmr 7 3 to which is connected a rod 74, the lower end of which connectswith the operating portion 75 of the gas inlet valve indicated generallyat 41 in Fig;

2. lilith this larrangement for moving the damper to and from closedposition the valve will be automatically closed and openedk to controlthe supply of rgas to the burner.y

he vertical portion of the door 14 is spaced from the plane of the wall13 and is provided with inwardly projecting lugs 76 for supporting avertically disposed plate 7 7 relatively close to the heating coils 32.y The lower end of the .plate 77 is substantially coincident with thelower wall section 13 as rshown 3. Theupperend of the saidplate overliesthe cover plate 63, thus forming a choke chamber 79 for the products ofcombustion which servesto delaythe passage of the gas on its `way tocooling chambers 80 and 66 and the outlet pipe 18. yThe plate 77 isprovided with a plurality. of V-shaped ribs 81, only one of which isshown. `These ribs are disposed opposite the openings between the coils32 whereby to aiford an opening of more uniform proportions for thepassage L0f the gas discharging intothe choke chamber 79. y

By spacing the plate k77 from the door ak cold air passage 82 isprovided which is open at its lower end for substantially the fulllength of the door. The passage 82 terminates at its upperend in asomewhat restricted outlet 83 formed bv spacing the ange 78 but slightlybelow the lower edge of the upper wall section 13. The cold airdischarging through the outlet 83 enters the cooling chamber 80 in whichthe damperoperates and into which a considerable portion of the heatedgas is discharged from the' choke chamber79. A portion of the cold airwill pass between the upper edge of the damper and the wall 18 and theremaining portion y beneath the damper. By breaking up the cold aircurrent 'in this manner within the chamber 8O it will become morethoroughly mixed with the products of combustion discharging from'. thechoke chamber 79. The cold air admitted' to the chamber 80 continues tomix with the products of combustion ywhile passing through the coolingchamber 66 to ing the size of the cold rair passage 83 the velocity ofthe air will be somewhat increased when entering the chamber 80 wherebya more complete mixing of the ,gas and air will f be afforded. e u

Since the top of the heating chamber 31 is substantially closedexcept-yfor a relatively narrow outletk passage at one side thereof, c

extending between the closure 68 andplate 77 and since the chamber 79serves as a choke passage,r the products of combustionfwill be retainedwithin the chamber 31 fora maximum period and consequently greatereiiiciency is insuredwith a minimum consumpi tion of the fuel.' Thecooling vof the products of combustion in the manner described is highlyadvantageous for the reasons stated. Furthermore the passing of therelatively cold air or Vthat which is at room temperature upwardlythrough the door'chamber 82 serves the double purpose of cooling theproducts of ycombustion and ofprotecting the door from the relativelyhigh temperatures in the heating chamber. The choking of the burning`gas within the coils by means of the cone-shaped members 35 is obviouslyadvantaeeous since it'results in forcing the gas into direct Contactwith the coils. t will be understood as stated above that when it isdesired to use only the fire box 19 as a heating chamber the damper 67will be closed. However for a more rapid heating of the water bothcombustion chambers may be used at the same time.

I claim as my invention: Y

l. in a water heating apparatus, the combination ofa heating chamber,fuel burning means at the bottom thereof, water circulating means withinsaid chamber, a cooling chamber above the heating chamber, sepa'- ratingbetween said chambers designed to restrict the flow of the products ofcombustion to the cooling chamber and means at one side ofthe heatingchamber forminfY a vertical passage' for the upward flow or cold air tothe cooling chamber.

2. ln a water heating apparatus, the combination of a heating chamber,fuel burning neans at the bottom thereof, water circulating means withinsaid chamber, a cooling chamber above the heating' chamber, separatingmeans between said chambers designed to restrict the flow of theproducts of combustion tothe cooling chamber, means at one side of theheating chamber forming a passage for the delivery of cold air to thecooling chamber and mea-ns ertending` within said cooling chamberserving to increase the turbulence of the air and gas dischangingAthereto whereby to more intimately mix the same.

3. In a water heating apparatus, the combination of a heating chamber,fuel burning means at the bottom thereof, water circulatingmeansdisposed within the chamber, a

cooling chamber overlying the heating chamber, means interposed betweensaid chambers affording restricted outlet for the discharge oftherproducts of combustion to the coolingk chamber, one of the sidewalls of the heating chamber being extended above the top of the chamberand. having a iiange-like portion projecting into the cooling chamber,vand a vertically disposed plate spaced from said side wall andvcooperating therewith to form a cold air leading upwardly anddischarging into the cooling chamber above said flange-like portion. y yy 4. In a water heating apparatus, the combination Lof a vheatingchamber, fuel burning means at the bottom thereof, water circulatingmeans within said chamber, a cooling chamber above the heating chamber,sepameans between said chambers designed tor limit the flow of theproducts of combustion to the 'cooling chamber, means formingk aVpassage for the delivery of the cold air to` said cooling chamber, anda second cooling chamber separated from the first by a vertical sidewall,said wall having an opening for the passage of the air and gas tothe said second cooling chamber.

5. in a water heating apparatus, the combination of a heating chamber,fuel burning means at the bottom thereof, water circu lating meanswithin said chamber, means substantially closing the upper end of saidchamber designed to afford a limited outlet for the discharge of theproducts of combustion therefrom, separate cooling chambers above saidheating chamber having a communieating passage therebetween, one of saidchambers communicating with the heating chamber, means for opening andclosing said passage and means'forming a supply passage for the deliveryof cold air to the cooling charnber communicating with the heatingchamber.

G. ln water heating apparatus, the combination of a heating' chamber,fuel burning means at the bottom thereof, water circulating means withinsaid chamber, a cooling chamber above said heating chamber, a chokechamber between said cooling and heating chambers for checking the flowof t-he heated gas discharging from the heating chamber and meansforming a vertically disposed cold air passage arranged to discharge atits upper end into said cooling chamber.

7. In water heating apparatus, the combination of a heating chamber,fuel burning means at the bottom thereof, water circulating` meanswithin said chamber, a coolingV chamber above said heating chamber,means forming a transversely extending choke chamber between the firstmentioned chambers, said choke chamber having an inlet at one end and anoutlet at the other discharging into the cooling chamber and meansforming a cold air passage leading to the cooling chamber. Y 8. ln awater heating apparatus, the combination of a heating chamber, fuelburning means at the bottom thereof, water circulating means within thechamber, a platevextending across the top of said chamber havinoone edgespaced from one of the side walls or the chamber to form a relativelynarrow passage for the escape of the products of combustion, a coolingchamber communicating with said heating chamber through said passage andaplate member spaced from said side wall and cooperating therewith toform a'verticall'y disposed ycold air passage open at its lower end anddischarging at its upper end into said cooling chamber to cool theproduct-s of combustion discharging thereto from the heating chamberQ 9.In a water heating apparatus, the combination yof a heating chamber,Yfuel burning means at thek bottom thereof, water circulating meanswithin said chamber, a cooling lil() chamber above said heating chamber,a wall interposed between said chambers having a restricted outlet forthe escape of the gas to the coolingy chamber, a vertically disposedplate spaced from one of the side walls of the heating chamber to form acold air passage communicating at its upper end with the lower portionof said cooling chamber, said cooling chamber having an outlet at oneside thereof and a plate extending longitudinally within said coolingchamber between the top and bottom thereof and in spaced relation to theside walls of the chamber and serving to direct a portion of theintlowing air to the uppei part of said chamber. y

10. In a water heating apparatus, the combination of a cooling chamber,a heating chamber below the cooling chamber separated from the latter bya wall constructed to aord a relatively narrow outlet adjacent one ofthe side walls of the heating chamber for the escape of the products ofcombustion to the cooling chamber, water circulating means within theheating chamber, a gas burner at the bottom of the heating chamber, anda dooi at one side of the heating chamber forming a support for saidside wall, the latter being spaced from the door and cooperatingtherewith to form a cold ai'il passage open at its lower end andcommunicating at its upper end with said cooling chamber.

11. In a water lieatingapparatus, the coinbination of a heating chamberhaving side and en'd walls, a plurality of water circulating coilswithin the chamber, plate members on said end walls cooperating withportions there-of to form insulating air spaces and also serving todirect the products of combustion inwardly from the lower endy portionsof the heating chamber, a cooling chamber overlying the heating chamber,a wall separating said chambers and having its ends resting on andsupported by said plate members, said wall being constructed to limitthe low 'of the products of combustion from the heating to the coolingchamber, and a gas burner at the bottom of the heating chamber.

12. In a water heating apparatus, the coinbination of a heating chambercomprising side and end walls, vplate members arranged adj acentsaid endwalls to form insulating air spaces for the protection thereof, a doorat one side of the heating chamber, a wall overlying said heatingchamber and supported by said plate members, said wall aifording arelatively narrow outlet for the escape of the products of combustionfrom sai-d chamber and being removable through the door opening, acooling chamber above the heating chamber communicating with saidoutlet, a gas burner at the bottom of said f heating chamber, and watercirculating means within the heating chamber.

13. In a water heating apparatus, the com bination of a heating chambercomprising sidewallsand an upper closing wall con`- structed to affordarelatively narrow passage adjacent one'of the side walls for the' escapeof the products of combustion, thefopposite side wall comprising a watercompartment, water circulating coilswithin said chamber directlybelowsaid upper wall, said coils beingin communication'with Jsaid watercoinpartment,a gas burner at the bottom of said chamber, a coolingchamber above said heating chamber, and achoke passage between saidchambers having one end communicating with said relatively narrowpassage and the other end provided with'an outlet passage discharging tothe cooling chamber. i

14. In a water heating apparatus, the coin- Ybination of aheatingchamber having a relatively narrow outlet in its top walladjacent one of its side walls, its opposite sidewall comprising awatercirculating compartment, a plurality of vertically disposedwatercirculating coils within said chamber having their end portionsconnected with said compartment, a coneeshaped member extendingvertically within each coil with its smaller end adjacent the bottom ofthe coil, a gas burner at the bottom of said heating chamber, a coolingchamber above said heating chamber and a plate member projectinginwardly from the side wall opposite said compartinent at a pointdirectly above said outlet whereby to deflect the products of combustionpassing from the heating to the cooling chamber.

15. In a combined coal and gas water heater, the combination with awater compartment forming one wall of a ire boX, a gas heated chamberlocated adjacent the lire box, a plurality of water circulating coilswithin the gas heated chamber communicating with j said watercompartment, of a cooling chamber above the heating chamber separatedtherefrom by a wall affording a restricted passage for the products ofcombustion to the cooling chamber and a door spaced from one of the sidewalls of the heatingy chamber arranged to support the latter andcooperating therewith to form a vertically disposed cold air passageopen at its lower end and communicating at its upper end with saidcooling chamber. f

16. In a combined coal and gas water heater, the combination with awater compartment forming one wall of a fire box, agas heated chamberlocated adjacent the iire box, a plurality of watercirculatingcoilswithin the gas heated chamber communicating with` said watercompartment, of a cooling chamber above the heating ychambery separatedtherefrom by a wall affording a. restricted pas-r sage for the productsof combustion to the cooling chamber, a member spacedfroin one of theside walls of the heating chamber forming a vertically disposed coldairr passage open at itsilower end and communicating at n its upper endwith said cooling chamber, an adjustable member extending Within thecooling chamber forming means for increasing the turbulence of the airand gas flowing thereto, and a second cooling chamber adjacent one ofthe side Walls of the rst mentioned cooling chamber, said Wall having,-an opening for the escape of the mixture of air and gas to the secondcooling chamber, said 10 adjustable member being movable to closeV saidopening When the tire box is used to heat the Water.

17 In apparatus of the class described, a heating chamber, a burnercompartmem:V at 1f the bottom of said chamber,l a burner extendinglongitudinally Within said compartment, a closure for one end of thecompartment, a gas supply pipe connected With the burner, and a bottomplate forrthe burner compart- 0 ment having one end supported by saidpipe and the other by said closure, the closure and bottom plate beingremovable as a unit.

MAURUS C. BECK.

flor

